the /shopcasting doesn't work unless the instant spell doesn't trigger the global cooldown. totems use global cooldown, so you can't do this. the closest to what you can do is this:
/castsequence <spell one>, <Spell two>, etc...
you'd just click it, wait the second or so for the global cooldown, hit it again, wait for the cooldown...

yeah, I ended up having to do the /castsequence method. Guess I cant be lazy. From what I understand Blizz considers this to be cheating. Thanks for the info